The invention discloses a metal coil single-coil binding device with opening and closing functions. The device comprises a binding trolley (1), a threading channel, a wedge-shaped block (2) arranged on the binding trolley (1), a vertical movement mechanism and a horizontal movement mechanism; the vertical movement mechanism comprises a platform (48) fixedly arranged on the binding trolley (1), a vertical guide rail (3) fixed on the platform (48), and a sliding box (4) mounted on the vertical guide rail (3) in a sliding mode; the horizontal movement mechanism comprises a horizontal guide rail (7) and a horizontal oil cylinder (8), wherein the horizontal guide rail (7) and the horizontal oil cylinder (8) are fixedly arranged in the sliding box (4); a wedge-shaped block (2) is positioned on the left side of the platform (48), the inclined surface of the wedge-shaped block (2) is obliquely arranged downwards, an inclined hydraulic sliding table (10) which is arranged in the inclined surface direction is fixedly arranged on the inclined surface, and a grabbing claw and a torsion mechanism are arranged on the inclined hydraulic sliding table (10). The device has the beneficial effects that the structure is compact, the labor intensity of workers is reduced, the single-coil rapid binding is realized, and the operation is simple.